本发明提供了其由式（1）表示的化合物和聚合物。 其中，R 1和每个R 2独立地表示氢原子，任选取代的烷基，任选取代的芳基，杂芳基，其可以具有取代基 或-CO-R（式中，R表示任选取代的烷基，可具有芳基或取代的基团可以具有取代基的杂芳基。） 和环A，环B和环C各自独立地为杂芳族环的5元和可具有取代基或6元，n为1〜4的整数。 ]

The present invention provides compounds and polymers represented by the formula (1).

[In the formula, R ¹ and each R ² is independently a hydrogen atom, an optionally substituted alkyl group, an optionally substituted aryl group, an optionally substituted heteroaryl an aryl group or -CO-R (in the formula, R represents an optionally substituted alkyl group, a heteroaryl group which may have an aryl group or a substituted group may have a substituent .), and ring a, ring B and ring C are each independently an aromatic heterocyclic ring of 5-membered and may have a substituent or 6-membered, n is is an integer of from 1 to 4 . ]